Salisbury Steak with Mushroom Gravy and Roasted Brussels Sprouts

Ground Beef, Cremini Mushrooms, Grapeseed Oil, Salt, Pepper, Garlic, Veal Stock (Veal Bones, Water, Onion, Celery, Carrots, Leeks, Garlic, Thyme, Parsley), Brussels Sprouts, Red Wine, Arrowroot